Study of the Kinetic Energy Anisotropy Over Spherical Shells Downstream of Stenotic and Bioprosthetic Aortic Valves
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Haemodynamic transition-to-turbulence due to aortic stenoses or non-optimal bioprosthetic aortic valves (BAVs) may contribute to a variety of pathophysiological effects. By means of three-dimensional Direct Numerical Simulation (DNS) of a stenotic flow and Fluid-Structure Interaction (FSI) simulations of BAVs with unstably moving leaflets, we study the anisotropy in the modal kinetic energy carried by the flow structures at various wavenumbers over time. A novel method is proposed to quantify the anisotropy in the kinetic energy for the investigated complex flows. Insights are also provided as to the connection between anisotropy intensity and BAVs design with a view to improving artificial aortic valve performance.
